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TRF371109: TRF371109 parallel external gain control.

Prodigy 160 points

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Part Number: TRF371109


I am using TRF371109 in my new design, I want to just use SPI to control the PGA gain, then how do I deal with the parallel external control pins(Gain_B0 ,Gain_B1,Gain_B2 )?

Can these three pins be left NC(No connect) if no use?